DATE_FORMAT()

函数说明

根据格式字符串格式化日期值。如果任一参数为 NULL，则函数返回 NULL。

DATE_FORMAT() 返回一个字符串，其中包含由 character_set_connection 和 collat​​ion_connection 给出的字符集和排序规则，以便它可以返回包含非 ASCII 字符的月份和工作日名称。

函数语法

1. > DATE_FORMAT(date,format)

参数释义

参数 说明
date 必要参数。date 参数是合法的日期表达式。
format 必要参数。Required. format 可用的说明符可以参加下表详情。

Format 说明符

Info

下表中显示的说明符可用于格式字符串。在格式说明符字符之前需要加 % 字符。说明符也适用于函数 UNIX_TIMESTAMP()。

说明符 描述
%a Abbreviated weekday name (Sun..Sat)
%b Abbreviated month name (Jan..Dec)
%c Month, numeric (0..12)
%D Day of the month with English suffix (0th, 1st, 2nd, 3rd, …)
%d Day of the month, numeric (00..31)
%e Day of the month, numeric (0..31)
%f Microseconds (000000..999999)
%H Hour (00..23)
%h Hour (01..12)
%I Hour (01..12)
%i Minutes, numeric (00..59)
%j Day of year (001..366)
%k Hour (0..23)
%l Hour (1..12)
%M Month name (January..December)
%m Month, numeric (00..12)
%p AM or PM
%r Time, 12-hour (hh:mm:ss followed by AM or PM)
%S Seconds (00..59)
%s Seconds (00..59)
%T Time, 24-hour (hh:mm:ss)
%U Week (00..53), where Sunday is the first day of the week; WEEK() mode 0
%u Week (00..53), where Monday is the first day of the week; WEEK() mode 1
%V Week (01..53), where Sunday is the first day of the week; WEEK() mode 2; used with %X
%v Week (01..53), where Monday is the first day of the week; WEEK() mode 3; used with %x
%W Weekday name (Sunday..Saturday)
%w Day of the week (0=Sunday..6=Saturday)
%X Year for the week where Sunday is the first day of the week, numeric, four digits; used with %V
%x Year for the week, where Monday is the first day of the week, numeric, four digits; used with %v
%Y Year, numeric, four digits
%y Year, numeric (two digits)
%% A literal % character
%x x, for any “x” not listed above

示例

1. mysql> SELECT DATE_FORMAT('2009-10-04 22:23:00', '%W %M %Y');
2. +--------------------------------------------+
3. | date_format(2009-10-04 22:23:00, %W %M %Y) |
4. +--------------------------------------------+
5. | Sunday October 2009                        |
6. +--------------------------------------------+
7. 1 row in set (0.01 sec)

9. mysql> SELECT DATE_FORMAT('2007-10-04 22:23:00', '%H:%i:%s');
10. +--------------------------------------------+
11. | date_format(2007-10-04 22:23:00, %H:%i:%s) |
12. +--------------------------------------------+
13. | 22:23:00                                   |
14. +--------------------------------------------+
15. 1 row in set (0.02 sec)

17. mysql> SELECT Date_format('1900-10-04 22:23:00', '%D %y %a %d %m %b %j');
18. +--------------------------------------------------------+
19. | date_format(1900-10-04 22:23:00, %D %y %a %d %m %b %j) |
20. +--------------------------------------------------------+
21. | 4th 00 Thu 04 10 Oct 277                               |
22. +--------------------------------------------------------+
23. 1 row in set (0.01 sec)

25. mysql> SELECT DATE_FORMAT('1997-10-04 22:23:00', '%H %k %I %r %T %S %w');
26. +--------------------------------------------------------+
27. | date_format(1997-10-04 22:23:00, %H %k %I %r %T %S %w) |
28. +--------------------------------------------------------+
29. | 22 22 10 10:23:00 PM 22:23:00 00 6                     |
30. +--------------------------------------------------------+
31. 1 row in set (0.01 sec)

33. mysql> SELECT DATE_FORMAT('1999-01-01', '%X %V');
34. +--------------------------------+
35. | date_format(1999-01-01, %X %V) |
36. +--------------------------------+
37. | 1998 52                        |
38. +--------------------------------+
39. 1 row in set (0.00 sec)

1. CREATE TABLE t2 (f1 DATETIME);
2. INSERT INTO t2 (f1) VALUES ('2005-01-01');
3. INSERT INTO t2 (f1) VALUES ('2005-02-01');

5. mysql> SELECT Date_format(f1, "%m") AS d1,
6. Date_format(f1, "%m") AS d2
7. FROM   t2
8. ORDER  BY Date_format(f1, "%m");
9. +------+------+
10. | d1   | d2   |
11. +------+------+
12. | 01   | 01   |
13. | 02   | 02   |
14. +------+------+
15. 2 rows in set (0.00 sec)

1. CREATE TABLE t5 (a int, b date);
2. INSERT INTO t5
3. VALUES    (1,
4. '2000-02-05'),
5. (2,
6. '2000-10-08'),
7. (3,
8. '2005-01-03'),
9. (4,
10. '2007-09-01'),
11. (5,
12. '2022-01-01');

14. mysql> SELECT * FROM   t5
15. WHERE  b = Date_format('20000205', '%Y-%m-%d');
16. +------+------------+
17. | a    | b          |
18. +------+------------+
19. |    1 | 2000-02-05 |
20. +------+------------+
21. 1 row in set (0.01 sec)

23. mysql> SELECT * FROM t5
24. WHERE  b != Date_format('20000205', '%Y-%m-%d');
25. +------+------------+
26. | a    | b          |
27. +------+------------+
28. |    2 | 2000-10-08 |
29. |    3 | 2005-01-03 |
30. |    4 | 2007-09-01 |
31. |    5 | 2022-01-01 |
32. +------+------------+
33. 4 rows in set (0.01 sec)

35. mysql> SELECT DATE_FORMAT("2009-01-01",'%W %d %M %Y') as valid_date;
36. +--------------------------+
37. | valid_date               |
38. +--------------------------+
39. | Thursday 01 January 2009 |
40. +--------------------------+
41. 1 row in set (0.00 sec)

限制

目前 date 格式只支持 yyyy-mm-dd 和 yyyymmdd 的数据格式。